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| Type |
Poster Presentation |
| Area |
Analytical Chemistry |
| Room No. |
Exhibition Hall 2 |
| Time |
4월 19일 (금요일) 11:00~12:30 |
| Code |
ANAL.P-252 |
| Subject |
Cure Monitoring and Adhesion Characterization of Epoxy Powder Coatings using Time-Domain NMR Relaxometry
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| Authors |
Daeun Lee
Analysis Research Team, KCC Central Research Institute, Korea |
| Abstract |
Epoxy powder coatings are eco-friendly coatings composed of 100% solids without any solvents, and widely used in the industrial field because of their excellent corrosion resistance and flexibility. In particular, the epoxy powder coatings for steel pipes improve the durability by protecting pipes from various corrosive environments such as moisture, dissolved oxygen, and bacteria. The failures such as water absorption or delamination of epoxy coatings are associated with the curing reaction and adhesion properties. Therefore, it is important to monitor the curing reaction to investigate the reaction rate and flow properties of the steel surface. We selected various epoxy resin types and observed the curing behavior using DSC. Also, time-domain NMR (TD-NMR) was used to confirm the flow characteristics through solid and liquid phase ratio during cure reaction. The adhesion test of coated specimens with hot water was conducted and compared with results from TD-NMR. We observed that the longer the spin-spin relaxation time, the better the fluidity on the steel surface during curing and the better the adhesion of the final cured coating. |
| E-mail |
daeun47@naver.com |
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123rd General Meeting of the KCS